Patent attributes
A vibratory angular rate sensor comprises a vibrator having a vibrating element arranged to oscillate along a first direction, the element being arranged to further oscillate along a second direction perpendicular to the first direction when subjected to angular rate about a third direction perpendicular to the first and second directions. The vibrating element is caused to oscillate at a predetermined frequency along the first direction. An oscillation detector generates a voltage representing oscillations of the vibrating element along the second direction. A first synchronous detector synchronously detects a primary frequency component of the generated voltage using clock pulses of the predetermined frequency to produce an output signal. A second synchronous detector synchronously detects an odd-numbered harmonic of the generated voltage using clock pulses of the odd-numbered harmonic frequency. A residual odd-numbered harmonic component contained in the output signal of the first synchronous detector is cancelled with the detected odd-numbered harmonic.
